Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d1006b27d9313c…

MALICIOUS

PDF

90.9 KB Created: 2021-08-05 16:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b94a92ebc784cdccac37203b4042597d SHA-1: 142c9f80ecbe20965d6c84eb82ff8da19333577f SHA-256: 00d1006b27d9313ca8fa52c94c12b8b9253eba05011cbd0d33bc2daec6080960
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests an attempt to disguise the malicious nature of the links, possibly for SEO manipulation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://chcial.ru/uplcv?utm_term=descargar+papita+mani+toston+2+pelicula+completa+en+espa%C3%B1ol+gratis PDF link annotation
    • http://ondrejkocar.cz/img/file/wekopoxozexekosetulavix.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/jivefububu.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/rijumejezopujorugebajan.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/sibupa.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/54120031836.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882821b5640---kiwik.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/subabulonid.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/648c4665302aad34724a569264553958/6416843149.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607af9ed1044d---povugewepejolawegixofuvam.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/72atsbnqm6be6n95fkjpd2h6ml/rujebatoselidisefatatu.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160e572496ea5b---fidebomidigomitaziliratu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/da4242a3ac903e72269143bf344a1c5f/16149826115.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/befapipifoxiluw.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607161fde7433---jebilekofaluvivuruxeki.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/lugemukoruz.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/7970ve9q6shfd0dsfhr7iear5p/56030688164.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/5a7510489db432582645f2e37afb80c7/gubotogamuben.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/77716fc2e0b2530685255573671c1663/zoraresofasesofi.pdfIn PDF document text
    • http://lowchens.org/userfiles/file/tufodizu.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ad2e78fe1---sijatapokivixaxevajog.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/10298733545.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8874cb993---28747973666.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/puwugiwadik.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96cac7f4e---82634964650.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/vvuli10vn49tlf1mruuftbqkj7/bejewafudawepigiroxavese.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 18372 bytes
SHA-256: 14c22713184006ab52b8b8c70927bf12bf25f241438de4a8f62e66d3ccff548f
font_01_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 2924 bytes
SHA-256: e0a60b31d1cf0adfa5bc48d808599827dba628aab5766c2e391be54167c17a27
font_02_sfnt_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 16268 bytes
SHA-256: 583775b412ef5c49e1e3d1d46ae6fffe4f2c7bf2c5385fe3dbdc3cc68f632db0
font_03_sfnt_off0001277f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 11144 bytes
SHA-256: b641eb8de3b962f15e5ed8e89585689a252d03aac22c0022c635f54254b022ad
font_04_sfnt_off00014160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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